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<br />Two options are proposed for reclamation; a lined reservoir or unlined lake. No water will be <br />consumed by a lined reservoir. Therefore, no augmentation will be required. Water will be required <br />to replace the amount evaporated by a lake. The maximum surface azea of the lake is estimated at <br />approximately I80 acres. The annual evaporation from the surface would be approximately 450 acre <br />feet. <br />Project Water Suooly <br />Cooley owns senior water rights in the South Platte River and Boulder Creek drainages. These rights <br />will be used to augment the depletions caused by the mining operation. As shown previously, the <br />depletions aze estimated at 20.9 acre feet per yeaz. <br />Cooley owns 1.5 shazes of the Smith and Emmons Ditch which aze used to irrigate some of the azea <br />proposed for mining. Based on the State Engineer diversion records, the 1.5 shazes have historically <br />diverted an average of 236.5 acre feet per yeaz. The water was used to irrigate 110 acres of crops, <br />including wrn and beets, and is currently used for pasture grass. The historic consumptive use by <br />• the shazes is estimated at approximately 142 acre feet per year. <br />The azea irrigated by the Smith and Emmons rights will be eliminated by mining. The consumptive <br />use credits will be used to augment mining depletions. The amount of consumptive use credits is <br />more than adequate for augmentation of depletions. However, since the rights were used only during <br />the irrigation season they cannot be used to augment depletions during winter unless the water is <br />stored for winter release. The amount of depletions occurring in the non-irrigation season is <br />approximately 30% of the annual total, or 6.3 acre feet. <br />There aze several options available to augment winter depletions. We anticipate one of two sources <br />will be utilized. The most desirable option would be to store the Smith and Emmons rights in an <br />upstream reservoir and release the water as needed. Another option would be to lease effluent from <br />upstream municipalities. <br />• <br />21 <br />K~~ <br />